Honestly i wish it was a joke, but its not. Our planet is being visited every single day and this very highly advanced technology is buzzing about in our atmosphere and freely interacting with humans, me included. It happened 7 months ago and it still seems like yesterday. Not an hour goes by that i do not think about it.
After it happened i was shaken and scared. I had problems sleeping for months. For months after i was jumpy. It was very easy to scare me. I'm much better now but the image of it is burned into my minds eye.
Now when i am outside i am always looking up and the sky.
I believe you those things were reported worldwide not just in US.. they are so far unexplained. I got two ideas since it shows signs of inteligence must be either some kind of new aircraft developed from someone on earth or someone from out there...
If we would to travel to other similar planets to ours, we would do the same thing...observe and gather information ( are they agressive? How evolved they are? What powers them? How do they interact with each other? Will they attack us? and so on..). Well maybe we would attacked them first.. and ask questions later US style!
But the point is you need to figure it out by yourself you have lots of material on those triangles,,, and i too am looking to stars wondering what will happen one day!
Matter of personal judgment and belief...